G - Physics – 01 – T
Patent
G - Physics
01
T
G01T 1/208 (2006.01) G01T 1/161 (2006.01) G01T 1/164 (2006.01)
Patent
CA 2273763
A method and apparatus for determining the centre photodetector in a planar array of photodetectors of a gamma scintillation camera is provided. The analog signals generated by a plurality of photomultiplier tubes (PMT) following a scintillation event, are digitized, integrated, and stored in a first memory. A first comparison means is used to divide the set of PMT logical signals into groups. Each group comprises an arbitrary number of PMTs. The PMT logical signals within a group are combined into pairs and compared to select the highest intensity value for each individual group. Subsets of local PMT highest intensity values are created. A second comparison means is used to receive the subsets of local PMT highest values, combine them into pairs, compare the paired signals, and record the selected signals in a second memory, until a PMT with the maximum intensity value or a centre PMT is obtained. The data stored during processing are then arranged in a versatile look up table to facilitate the assembly of relevant information characterizing the distribution of scintillations around the centre photodetector.
Schreck Zoltan
Stark Iain
Gowling Lafleur Henderson Llp
Is2 Research Inc.
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